DE69614330D1 - Low-loss acoustic wave filter, branch filter containing it and method - Google Patents

Low-loss acoustic wave filter, branch filter containing it and method

Info

Publication number
DE69614330D1
DE69614330D1 DE69614330T DE69614330T DE69614330D1 DE 69614330 D1 DE69614330 D1 DE 69614330D1 DE 69614330 T DE69614330 T DE 69614330T DE 69614330 T DE69614330 T DE 69614330T DE 69614330 D1 DE69614330 D1 DE 69614330D1
Authority
DE
Germany
Prior art keywords
low
acoustic wave
filter
branch
loss acoustic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE69614330T
Other languages
German (de)
Other versions
DE69614330T2 (en
Inventor
David Penunuri
Thomas Slocum Hickernell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CTS Corp
Original Assignee
CTS Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CTS Corp filed Critical CTS Corp
Publication of DE69614330D1 publication Critical patent/DE69614330D1/en
Application granted granted Critical
Publication of DE69614330T2 publication Critical patent/DE69614330T2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/64—Filters using surface acoustic waves
    • H03H9/6423—Means for obtaining a particular transfer characteristic
    • H03H9/6433—Coupled resonator filters
    • H03H9/6483—Ladder SAW filters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/42—Piezoelectric device making
DE69614330T 1995-09-11 1996-09-06 Low loss acoustic wave filter, branch filter containing it and method Expired - Fee Related DE69614330T2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/526,340 US5638036A (en) 1995-09-11 1995-09-11 Acoustic wave ladder filter with unequal series and shunt transducer periodicities and method of making

Publications (2)

Publication Number Publication Date
DE69614330D1 true DE69614330D1 (en) 2001-09-13
DE69614330T2 DE69614330T2 (en) 2002-05-23

Family

ID=24096933

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69614330T Expired - Fee Related DE69614330T2 (en) 1995-09-11 1996-09-06 Low loss acoustic wave filter, branch filter containing it and method

Country Status (5)

Country Link
US (1) US5638036A (en)
EP (1) EP0762644B1 (en)
JP (1) JPH09130204A (en)
DE (1) DE69614330T2 (en)
DK (1) DK0762644T3 (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3614234B2 (en) * 1996-03-14 2005-01-26 沖電気工業株式会社 Resonator type surface acoustic wave filter
JPH10276062A (en) * 1997-03-31 1998-10-13 Sanyo Electric Co Ltd Surface acoustic wave device
DE19730710C2 (en) * 1997-07-17 2002-12-05 Epcos Ag Surface acoustic wave filter with improved slope
US5854579A (en) * 1997-08-25 1998-12-29 Motorola Inc. Saw filter using low-pass configuration and method of providing the same
US5933062A (en) * 1997-11-04 1999-08-03 Motorola Inc. Acoustic wave ladder filter with effectively increased coupling coefficient and method of providing same
JP3576367B2 (en) * 1998-01-30 2004-10-13 沖電気工業株式会社 Surface acoustic wave filter
JP3228223B2 (en) * 1998-05-26 2001-11-12 株式会社村田製作所 Surface acoustic wave filter
JP2000286675A (en) * 1999-03-29 2000-10-13 Sanyo Electric Co Ltd Surface acoustic wave filter device and portable telephone set provided with it
US6570470B2 (en) * 2000-06-30 2003-05-27 Kyocera Corporation Surface acoustic wave ladder filter utilizing parallel resonators with different resonant frequencies
US6424238B1 (en) * 2001-01-08 2002-07-23 Motorola, Inc. Acoustic wave filter and method of forming the same
JP4056762B2 (en) * 2002-02-25 2008-03-05 富士通メディアデバイス株式会社 Surface acoustic wave device
KR101044971B1 (en) * 2003-07-30 2011-06-29 파나소닉 주식회사 Surface acoustic wave filter
CN100566151C (en) * 2004-01-09 2009-12-02 松下电器产业株式会社 SAW (Surface Acoustic Wave) resonator and the Surface Acoustic Wave Filter that adopts this SAW (Surface Acoustic Wave) resonator
JP2009088999A (en) * 2007-09-28 2009-04-23 Nippon Dempa Kogyo Co Ltd Elastic wave filter
US20090231060A1 (en) * 2008-03-11 2009-09-17 Rf Monolithics, Inc. Ladder resonator filter and related system
CN106253877B (en) * 2011-11-30 2019-03-08 天工滤波方案日本有限公司 Ladder-type acoustic wave filter and notch diplexer
US10230350B2 (en) 2016-06-15 2019-03-12 Resonant Inc. Surface acoustic wave filters with extracted poles

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2800905B2 (en) * 1991-10-28 1998-09-21 富士通株式会社 Surface acoustic wave filter
JPH06188673A (en) * 1992-12-18 1994-07-08 Fujitsu Ltd Surface acoustic wave filter
JP3191473B2 (en) * 1993-03-09 2001-07-23 三菱電機株式会社 Surface acoustic wave filter
US5471178A (en) 1994-02-03 1995-11-28 Motorola, Inc. Ladder filter and method for producing conjugately matched impedance

Also Published As

Publication number Publication date
US5638036A (en) 1997-06-10
EP0762644B1 (en) 2001-08-08
EP0762644A1 (en) 1997-03-12
JPH09130204A (en) 1997-05-16
DE69614330T2 (en) 2002-05-23
DK0762644T3 (en) 2001-11-12

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee